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| Registros recuperados: 40 | |
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| Duflo, Esther; Pande, Rohini. |
| The construction of large dams is one of the most costly and controversial forms of public infrastructure investment in developing countries, but little is known about their impact. This paper studies the productivity and distributional effects of large dams in India. To account for endogenous placement of dams we use GIS data and the fact that river gradient affects a district's suitability for dams to provide instrumental variable estimates of their impact. We find that, in a district where a dam is built, agricultural production does not increase but poverty does. In contrast, districts located downstream from the dam benefit from increased irrigation and see agricultural production increase and poverty fall. Overall, our estimates suggest that large... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Dams; Development planning; Program evaluation; India; Public Economics; O21; O12; H43; H23. |
| Ano: 2005 |
URL: http://purl.umn.edu/28373 |
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| Traini, C.; Proust, J. -n.; Menier, D.; Mathew, M. J.. |
| Estuaries are coastal areas controlled by hydrodynamic factors such as sea-level changes, waves and tidal currents, and river discharge. This study focuses on the Vilaine Estuary which is strongly impacted by human activity after construction of Arzal dam in 1970. The purpose of this research is to differentiate the role of natural from anthropogenic factors on sediment dynamics within the Vilaine Estuary. We are proposing a hypothetical model based on the hydrodynamic modification and morpho-sedimentary development by analyzing the natural estuarine evolution and the impact of human alteration to the natural system by utilizing datasets including river discharge, tidal currents, winds and wave activities to further combine with photographic, bathymetric,... |
| Tipo: Text |
Palavras-chave: Estuaries; Man-induced effects; Estuarine dynamics; Tidal flats; Salt marshes; Dams. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00639/75120/75516.pdf |
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| Leão,Raimundo A. de O.; Soares,Antônio A.; Teixeira,Adunias dos S.; Silva,Demetrius D. Da. |
| The state of Ceará, Brazil, has 75% of its area covered by Brazilian semiarid, with its peculiar features. In this state, the dams are constituted in water structure of strategic importance, ensuring, both in time and space, the development and supply of water to population. However, construction of reservoirs results in various impacts that should be carefully observed when deciding on their implementation. One of the impacts identified as negative is the increased evaporation, which constitutes a major component of water balance in reservoirs, especially in arid regions. Several methods for estimating evaporation have been proposed over time, many of them deriving from the Penman equation. This study evaluated six different methods for estimating... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dams; Semiarid; Hydrologycal modelling; Water balance. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000100014 |
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| Pompeu,Paulo dos Santos; Horta,Luiz Felipe Mascarenhas; Martinez,Carlos Barreira. |
| This work aimed to experimentally evaluate the behavior of Brazilian freshwater fish species when submitted to a gradual increase in pressure, as well as sudden decompression's effects simulating the passage through a hydroelectric turbine. Four species from the São Francisco river basin were tested: Astyanax bimaculatus, Hypostomus sp., Leporinus reinhardti and Prochilodus costatus. For all of them mortality rates due to decompression were extremely low. However, the symptoms related to decompression, such as bulged eyes and hemorrhage, were not observed only in Hypostomus sp., and were more frequent the larger the pressure values were, considering the values from which decompression was performed. All these symptoms decreased significantly after 24 h of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Downstream fish passage; Dams; Experimental apparatus; Fish mortality; Pressure effects on fish. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100015 |
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| Block, Paul J.. |
| Ethiopia is at a critical crossroads with a large and increasing population, a depressed national economy, insufficient agricultural production, and a low number of developed energy sources. The upper Blue Nile basin harbors considerable untapped potential for irrigation and hydropower development and expansion. Numerous hydrologic models have been developed to assess hydropower and agricultural irrigation potential within the basin, yet often fail to adequately address critical aspects, including the transient stages of large-scale reservoirs, relevant flow retention policies and associated downstream ramifications, and the implications of stochastic modeling of variable climate and climate change. A hydrologic model with dynamic climate capabilities is... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Ethiopia; Dams; Water resources development; Hydrologic model; Energy; Climate variability; Climate change; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/42413 |
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| SANTOS,CAROLYNE D.S.; BALBO,SANDRA L.; GUIMARÃES,ANA T.B.; SAGAE,SARA C.; NEGRETTI,FÁBIO; GRASSIOLLI,SABRINA. |
| ABSTRACT Here, we evaluated whether the exposure of rats to a cafeteria diet pre- and/or post-weaning, alters histological characteristics in the White Adipose Tissue (WAT), Brown Adipose Tissue (BAT), and liver of adult male offspring. Female Wistar rats were divided into Control (CTL; fed on standard rodent chow) and Cafeteria (CAF; fed with the cafeteria diet throughout life, including pregnancy and lactation). After birth, only male offspring (F1) were maintained and received the CTL or CAF diets; originating four experimental groups: CTL-CTLF1; CTL-CAFF1; CAF-CTLF1; CAF-CAFF1. Data of biometrics, metabolic parameters, liver, BAT and WAT histology were assessed and integrated using the Principal Component Analysis (PCA). According to PCA analysis worse... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Obesity; Dams; Offspring; Histology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602887 |
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| Registros recuperados: 40 | |
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